Abstract
The ion-exchange selectivities for oxoanions of some toxic elements and halogens were studies on an amorphous hydrous titanium dioxide (Am-HTDO) as a function of OH− and anion concentrations in chloride and nitrate media. The adsorption isotherm was of the Langmuir type. The selectivity sequence increased in the order of ClO −3 <BrO −3 <IO −3 ≪ SeO 2−3 <TeO 2−3 <As(OH) −4 . IO −3 was efficiently separated from ClO −3 and BrO −3 . As(OH) −4 and SeO 2−3 were selectively separated from seawater. Such high selectivity of Am-HTDO may provide a new concentration technique of these toxic elements in environmental materials.
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Synthetic inorganic ion-exchange materials LIX.
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Tsuji, M., Abe, M. Selective uptake of toxic elements by an amorphous titanium dioxide ion exchanger. Journal of Radioanalytical and Nuclear Chemistry, Articles 149, 109–118 (1991). https://doi.org/10.1007/BF02053718
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DOI: https://doi.org/10.1007/BF02053718